It's the cancelled Project Lydia: http://www.carbodydesign.com/archive/2008/02/18-bugatti-project-lydia/ http://www.leftlanenews.com/bugatti-developing-even-higher-performance-veyron.html
If only the veyron looked a little bit more like that from the start...OTOH I assume a lot of veyron owners like the veyron because it's sort of understated.